List of prehistoric scheduled monuments in Gwynedd (former Merionethshire)

The northern half includes the high mountains of Snowdonia and the mixed farmland and hills of the Llŷn Peninsula, which between them make up the historic county of Caernarvonshire.

The southern part of Gwynedd is the softer coastal and upland landscapes of the historic county of Merionethshire.

As well as several field systems, there are 47 defensive sites (20 on this list) such as hillforts and promentary forts, again from the Iron Age.

The compilation of the list is undertaken by Cadw Welsh Historic Monuments, which is an executive agency of the National Assembly of Wales.

[1] The list of scheduled monuments below is supplied by Cadw[2] with additional material from RCAHMW and Gwynedd Archaeological Trust.